ORCHID CHEMICALS and PHARMACEUTICALS LTD; REGURI, Buchi Reddy; UPPARAPALLI, Sampathkumar; SIVADAS, Anand; VIGNESWARA CHELLAM, Ravisankar; SHANMUGA SUNDARAM, Bharani Kumar; SUBBAIAH, Ramesh Patent: WO2011/12957 A1, 2011 ; Location in patent: Page/Page column 16 ;